On to the look-ahead picks for Week 18. (Yes, the NFL season now extends to an 18th round of games.)

No matter the number, injected into the final week of the regular season annually is a new variable: motivation. Some teams that have been ousted from playoff contention will have a shallow reservoir of incentive to tap.

What might have been an appealing underdog in previous weeks is no longer worth the risk. In fact, opting for a postseason-bound favorite, even at a sizable spread, might be advisable.

We open our final set of look-ahead suggestions this season with one such matchup. 

Week 18 lookahead lines

Packers (-11) at Lions, O/U 46.5
Bears at Vikings (-6), O/U 45
Patriots (-2.5) at Dolphins, O/U 39.5
Colts (-8.5) at Jaguars, O/U 44.5
Jets at Bills (-17), O/U 45
Panthers at Buccaneers (-16.5), O/U 43
Titans (-10) at Texans, O/U 44
Washington (-4) at Giants, O/U 41
Saints (-3.5) at Falcons, O/U 42
Cowboys (-3.5) at Eagles, O/U 44.5
Steelers at Ravens (-6.5), O/U 42
Bengals at Browns (-1.5), O/U 46
Seahawks at Cardinals (-5), O/U 46.5
Chiefs (-3) at Broncos, O/U 43.5
49ers at Rams (-6.5), O/U 44.5
Chargers (-2.5) at Raiders, O/U 47.5

Which Week 18 sides make for great plays before Week 17 kicks off? And which underdog is being severely mispriced by the market? ... Join SportsLine right now to see Week 18 lookahead picks from the expert who returned more than $2,500 on his NFL picks from 2016-20 and hit 56 percent of his ATS picks last year!